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7b405038 MH |
1 | /* drivers/devfreq/exynos4210_memorybus.c |
2 | * | |
3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
4 | * http://www.samsung.com/ | |
5 | * MyungJoo Ham <myungjoo.ham@samsung.com> | |
6 | * | |
7 | * EXYNOS4 - Memory/Bus clock frequency scaling support in DEVFREQ framework | |
8 | * This version supports EXYNOS4210 only. This changes bus frequencies | |
9 | * and vddint voltages. Exynos4412/4212 should be able to be supported | |
10 | * with minor modifications. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/io.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/mutex.h> | |
21 | #include <linux/suspend.h> | |
22 | #include <linux/opp.h> | |
23 | #include <linux/devfreq.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/regulator/consumer.h> | |
26 | #include <linux/module.h> | |
27 | ||
28 | /* Exynos4 ASV has been in the mailing list, but not upstreamed, yet. */ | |
29 | #ifdef CONFIG_EXYNOS_ASV | |
30 | extern unsigned int exynos_result_of_asv; | |
31 | #endif | |
32 | ||
33 | #include <mach/regs-clock.h> | |
34 | ||
35 | #include <plat/map-s5p.h> | |
36 | ||
37 | #define MAX_SAFEVOLT 1200000 /* 1.2V */ | |
38 | ||
39 | enum exynos4_busf_type { | |
40 | TYPE_BUSF_EXYNOS4210, | |
41 | TYPE_BUSF_EXYNOS4x12, | |
42 | }; | |
43 | ||
44 | /* Assume that the bus is saturated if the utilization is 40% */ | |
45 | #define BUS_SATURATION_RATIO 40 | |
46 | ||
47 | enum ppmu_counter { | |
48 | PPMU_PMNCNT0 = 0, | |
49 | PPMU_PMCCNT1, | |
50 | PPMU_PMNCNT2, | |
51 | PPMU_PMNCNT3, | |
52 | PPMU_PMNCNT_MAX, | |
53 | }; | |
54 | struct exynos4_ppmu { | |
55 | void __iomem *hw_base; | |
56 | unsigned int ccnt; | |
57 | unsigned int event; | |
58 | unsigned int count[PPMU_PMNCNT_MAX]; | |
59 | bool ccnt_overflow; | |
60 | bool count_overflow[PPMU_PMNCNT_MAX]; | |
61 | }; | |
62 | ||
63 | enum busclk_level_idx { | |
64 | LV_0 = 0, | |
65 | LV_1, | |
66 | LV_2, | |
67 | LV_3, | |
68 | LV_4, | |
69 | _LV_END | |
70 | }; | |
71 | #define EX4210_LV_MAX LV_2 | |
72 | #define EX4x12_LV_MAX LV_4 | |
73 | #define EX4210_LV_NUM (LV_2 + 1) | |
74 | #define EX4x12_LV_NUM (LV_4 + 1) | |
75 | ||
76 | struct busfreq_data { | |
77 | enum exynos4_busf_type type; | |
78 | struct device *dev; | |
79 | struct devfreq *devfreq; | |
80 | bool disabled; | |
81 | struct regulator *vdd_int; | |
82 | struct regulator *vdd_mif; /* Exynos4412/4212 only */ | |
83 | struct opp *curr_opp; | |
84 | struct exynos4_ppmu dmc[2]; | |
85 | ||
86 | struct notifier_block pm_notifier; | |
87 | struct mutex lock; | |
88 | ||
89 | /* Dividers calculated at boot/probe-time */ | |
90 | unsigned int dmc_divtable[_LV_END]; /* DMC0 */ | |
91 | unsigned int top_divtable[_LV_END]; | |
92 | }; | |
93 | ||
94 | struct bus_opp_table { | |
95 | unsigned int idx; | |
96 | unsigned long clk; | |
97 | unsigned long volt; | |
98 | }; | |
99 | ||
100 | /* 4210 controls clock of mif and voltage of int */ | |
101 | static struct bus_opp_table exynos4210_busclk_table[] = { | |
102 | {LV_0, 400000, 1150000}, | |
103 | {LV_1, 267000, 1050000}, | |
104 | {LV_2, 133000, 1025000}, | |
105 | {0, 0, 0}, | |
106 | }; | |
107 | ||
108 | /* | |
109 | * MIF is the main control knob clock for exynox4x12 MIF/INT | |
110 | * clock and voltage of both mif/int are controlled. | |
111 | */ | |
112 | static struct bus_opp_table exynos4x12_mifclk_table[] = { | |
113 | {LV_0, 400000, 1100000}, | |
114 | {LV_1, 267000, 1000000}, | |
115 | {LV_2, 160000, 950000}, | |
116 | {LV_3, 133000, 950000}, | |
117 | {LV_4, 100000, 950000}, | |
118 | {0, 0, 0}, | |
119 | }; | |
120 | ||
121 | /* | |
122 | * INT is not the control knob of 4x12. LV_x is not meant to represent | |
123 | * the current performance. (MIF does) | |
124 | */ | |
125 | static struct bus_opp_table exynos4x12_intclk_table[] = { | |
126 | {LV_0, 200000, 1000000}, | |
127 | {LV_1, 160000, 950000}, | |
128 | {LV_2, 133000, 925000}, | |
129 | {LV_3, 100000, 900000}, | |
130 | {0, 0, 0}, | |
131 | }; | |
132 | ||
133 | /* TODO: asv volt definitions are "__initdata"? */ | |
134 | /* Some chips have different operating voltages */ | |
135 | static unsigned int exynos4210_asv_volt[][EX4210_LV_NUM] = { | |
136 | {1150000, 1050000, 1050000}, | |
137 | {1125000, 1025000, 1025000}, | |
138 | {1100000, 1000000, 1000000}, | |
139 | {1075000, 975000, 975000}, | |
140 | {1050000, 950000, 950000}, | |
141 | }; | |
142 | ||
143 | static unsigned int exynos4x12_mif_step_50[][EX4x12_LV_NUM] = { | |
144 | /* 400 267 160 133 100 */ | |
145 | {1050000, 950000, 900000, 900000, 900000}, /* ASV0 */ | |
146 | {1050000, 950000, 900000, 900000, 900000}, /* ASV1 */ | |
147 | {1050000, 950000, 900000, 900000, 900000}, /* ASV2 */ | |
148 | {1050000, 900000, 900000, 900000, 900000}, /* ASV3 */ | |
149 | {1050000, 900000, 900000, 900000, 850000}, /* ASV4 */ | |
150 | {1050000, 900000, 900000, 850000, 850000}, /* ASV5 */ | |
151 | {1050000, 900000, 850000, 850000, 850000}, /* ASV6 */ | |
152 | {1050000, 900000, 850000, 850000, 850000}, /* ASV7 */ | |
153 | {1050000, 900000, 850000, 850000, 850000}, /* ASV8 */ | |
154 | }; | |
155 | ||
156 | static unsigned int exynos4x12_int_volt[][EX4x12_LV_NUM] = { | |
157 | /* 200 160 133 100 */ | |
158 | {1000000, 950000, 925000, 900000}, /* ASV0 */ | |
159 | {975000, 925000, 925000, 900000}, /* ASV1 */ | |
160 | {950000, 925000, 900000, 875000}, /* ASV2 */ | |
161 | {950000, 900000, 900000, 875000}, /* ASV3 */ | |
162 | {925000, 875000, 875000, 875000}, /* ASV4 */ | |
163 | {900000, 850000, 850000, 850000}, /* ASV5 */ | |
164 | {900000, 850000, 850000, 850000}, /* ASV6 */ | |
165 | {900000, 850000, 850000, 850000}, /* ASV7 */ | |
166 | {900000, 850000, 850000, 850000}, /* ASV8 */ | |
167 | }; | |
168 | ||
169 | /*** Clock Divider Data for Exynos4210 ***/ | |
170 | static unsigned int exynos4210_clkdiv_dmc0[][8] = { | |
171 | /* | |
172 | * Clock divider value for following | |
173 | * { DIVACP, DIVACP_PCLK, DIVDPHY, DIVDMC, DIVDMCD | |
174 | * DIVDMCP, DIVCOPY2, DIVCORE_TIMERS } | |
175 | */ | |
176 | ||
177 | /* DMC L0: 400MHz */ | |
178 | { 3, 1, 1, 1, 1, 1, 3, 1 }, | |
179 | /* DMC L1: 266.7MHz */ | |
180 | { 4, 1, 1, 2, 1, 1, 3, 1 }, | |
181 | /* DMC L2: 133MHz */ | |
182 | { 5, 1, 1, 5, 1, 1, 3, 1 }, | |
183 | }; | |
184 | static unsigned int exynos4210_clkdiv_top[][5] = { | |
185 | /* | |
186 | * Clock divider value for following | |
187 | * { DIVACLK200, DIVACLK100, DIVACLK160, DIVACLK133, DIVONENAND } | |
188 | */ | |
189 | /* ACLK200 L0: 200MHz */ | |
190 | { 3, 7, 4, 5, 1 }, | |
191 | /* ACLK200 L1: 160MHz */ | |
192 | { 4, 7, 5, 6, 1 }, | |
193 | /* ACLK200 L2: 133MHz */ | |
194 | { 5, 7, 7, 7, 1 }, | |
195 | }; | |
196 | static unsigned int exynos4210_clkdiv_lr_bus[][2] = { | |
197 | /* | |
198 | * Clock divider value for following | |
199 | * { DIVGDL/R, DIVGPL/R } | |
200 | */ | |
201 | /* ACLK_GDL/R L1: 200MHz */ | |
202 | { 3, 1 }, | |
203 | /* ACLK_GDL/R L2: 160MHz */ | |
204 | { 4, 1 }, | |
205 | /* ACLK_GDL/R L3: 133MHz */ | |
206 | { 5, 1 }, | |
207 | }; | |
208 | ||
209 | /*** Clock Divider Data for Exynos4212/4412 ***/ | |
210 | static unsigned int exynos4x12_clkdiv_dmc0[][6] = { | |
211 | /* | |
212 | * Clock divider value for following | |
213 | * { DIVACP, DIVACP_PCLK, DIVDPHY, DIVDMC, DIVDMCD | |
214 | * DIVDMCP} | |
215 | */ | |
216 | ||
217 | /* DMC L0: 400MHz */ | |
218 | {3, 1, 1, 1, 1, 1}, | |
219 | /* DMC L1: 266.7MHz */ | |
220 | {4, 1, 1, 2, 1, 1}, | |
221 | /* DMC L2: 160MHz */ | |
222 | {5, 1, 1, 4, 1, 1}, | |
223 | /* DMC L3: 133MHz */ | |
224 | {5, 1, 1, 5, 1, 1}, | |
225 | /* DMC L4: 100MHz */ | |
226 | {7, 1, 1, 7, 1, 1}, | |
227 | }; | |
228 | static unsigned int exynos4x12_clkdiv_dmc1[][6] = { | |
229 | /* | |
230 | * Clock divider value for following | |
231 | * { G2DACP, DIVC2C, DIVC2C_ACLK } | |
232 | */ | |
233 | ||
234 | /* DMC L0: 400MHz */ | |
235 | {3, 1, 1}, | |
236 | /* DMC L1: 266.7MHz */ | |
237 | {4, 2, 1}, | |
238 | /* DMC L2: 160MHz */ | |
239 | {5, 4, 1}, | |
240 | /* DMC L3: 133MHz */ | |
241 | {5, 5, 1}, | |
242 | /* DMC L4: 100MHz */ | |
243 | {7, 7, 1}, | |
244 | }; | |
245 | static unsigned int exynos4x12_clkdiv_top[][5] = { | |
246 | /* | |
247 | * Clock divider value for following | |
248 | * { DIVACLK266_GPS, DIVACLK100, DIVACLK160, | |
249 | DIVACLK133, DIVONENAND } | |
250 | */ | |
251 | ||
252 | /* ACLK_GDL/R L0: 200MHz */ | |
253 | {2, 7, 4, 5, 1}, | |
254 | /* ACLK_GDL/R L1: 200MHz */ | |
255 | {2, 7, 4, 5, 1}, | |
256 | /* ACLK_GDL/R L2: 160MHz */ | |
257 | {4, 7, 5, 7, 1}, | |
258 | /* ACLK_GDL/R L3: 133MHz */ | |
259 | {4, 7, 5, 7, 1}, | |
260 | /* ACLK_GDL/R L4: 100MHz */ | |
261 | {7, 7, 7, 7, 1}, | |
262 | }; | |
263 | static unsigned int exynos4x12_clkdiv_lr_bus[][2] = { | |
264 | /* | |
265 | * Clock divider value for following | |
266 | * { DIVGDL/R, DIVGPL/R } | |
267 | */ | |
268 | ||
269 | /* ACLK_GDL/R L0: 200MHz */ | |
270 | {3, 1}, | |
271 | /* ACLK_GDL/R L1: 200MHz */ | |
272 | {3, 1}, | |
273 | /* ACLK_GDL/R L2: 160MHz */ | |
274 | {4, 1}, | |
275 | /* ACLK_GDL/R L3: 133MHz */ | |
276 | {5, 1}, | |
277 | /* ACLK_GDL/R L4: 100MHz */ | |
278 | {7, 1}, | |
279 | }; | |
280 | static unsigned int exynos4x12_clkdiv_sclkip[][3] = { | |
281 | /* | |
282 | * Clock divider value for following | |
283 | * { DIVMFC, DIVJPEG, DIVFIMC0~3} | |
284 | */ | |
285 | ||
286 | /* SCLK_MFC: 200MHz */ | |
287 | {3, 3, 4}, | |
288 | /* SCLK_MFC: 200MHz */ | |
289 | {3, 3, 4}, | |
290 | /* SCLK_MFC: 160MHz */ | |
291 | {4, 4, 5}, | |
292 | /* SCLK_MFC: 133MHz */ | |
293 | {5, 5, 5}, | |
294 | /* SCLK_MFC: 100MHz */ | |
295 | {7, 7, 7}, | |
296 | }; | |
297 | ||
298 | ||
299 | static int exynos4210_set_busclk(struct busfreq_data *data, struct opp *opp) | |
300 | { | |
301 | unsigned int index; | |
302 | unsigned int tmp; | |
303 | ||
304 | for (index = LV_0; index < EX4210_LV_NUM; index++) | |
305 | if (opp_get_freq(opp) == exynos4210_busclk_table[index].clk) | |
306 | break; | |
307 | ||
308 | if (index == EX4210_LV_NUM) | |
309 | return -EINVAL; | |
310 | ||
311 | /* Change Divider - DMC0 */ | |
312 | tmp = data->dmc_divtable[index]; | |
313 | ||
314 | __raw_writel(tmp, S5P_CLKDIV_DMC0); | |
315 | ||
316 | do { | |
317 | tmp = __raw_readl(S5P_CLKDIV_STAT_DMC0); | |
318 | } while (tmp & 0x11111111); | |
319 | ||
320 | /* Change Divider - TOP */ | |
321 | tmp = data->top_divtable[index]; | |
322 | ||
323 | __raw_writel(tmp, S5P_CLKDIV_TOP); | |
324 | ||
325 | do { | |
326 | tmp = __raw_readl(S5P_CLKDIV_STAT_TOP); | |
327 | } while (tmp & 0x11111); | |
328 | ||
329 | /* Change Divider - LEFTBUS */ | |
330 | tmp = __raw_readl(S5P_CLKDIV_LEFTBUS); | |
331 | ||
332 | tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK); | |
333 | ||
334 | tmp |= ((exynos4210_clkdiv_lr_bus[index][0] << | |
335 | S5P_CLKDIV_BUS_GDLR_SHIFT) | | |
336 | (exynos4210_clkdiv_lr_bus[index][1] << | |
337 | S5P_CLKDIV_BUS_GPLR_SHIFT)); | |
338 | ||
339 | __raw_writel(tmp, S5P_CLKDIV_LEFTBUS); | |
340 | ||
341 | do { | |
342 | tmp = __raw_readl(S5P_CLKDIV_STAT_LEFTBUS); | |
343 | } while (tmp & 0x11); | |
344 | ||
345 | /* Change Divider - RIGHTBUS */ | |
346 | tmp = __raw_readl(S5P_CLKDIV_RIGHTBUS); | |
347 | ||
348 | tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK); | |
349 | ||
350 | tmp |= ((exynos4210_clkdiv_lr_bus[index][0] << | |
351 | S5P_CLKDIV_BUS_GDLR_SHIFT) | | |
352 | (exynos4210_clkdiv_lr_bus[index][1] << | |
353 | S5P_CLKDIV_BUS_GPLR_SHIFT)); | |
354 | ||
355 | __raw_writel(tmp, S5P_CLKDIV_RIGHTBUS); | |
356 | ||
357 | do { | |
358 | tmp = __raw_readl(S5P_CLKDIV_STAT_RIGHTBUS); | |
359 | } while (tmp & 0x11); | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static int exynos4x12_set_busclk(struct busfreq_data *data, struct opp *opp) | |
365 | { | |
366 | unsigned int index; | |
367 | unsigned int tmp; | |
368 | ||
369 | for (index = LV_0; index < EX4x12_LV_NUM; index++) | |
370 | if (opp_get_freq(opp) == exynos4x12_mifclk_table[index].clk) | |
371 | break; | |
372 | ||
373 | if (index == EX4x12_LV_NUM) | |
374 | return -EINVAL; | |
375 | ||
376 | /* Change Divider - DMC0 */ | |
377 | tmp = data->dmc_divtable[index]; | |
378 | ||
379 | __raw_writel(tmp, S5P_CLKDIV_DMC0); | |
380 | ||
381 | do { | |
382 | tmp = __raw_readl(S5P_CLKDIV_STAT_DMC0); | |
383 | } while (tmp & 0x11111111); | |
384 | ||
385 | /* Change Divider - DMC1 */ | |
386 | tmp = __raw_readl(S5P_CLKDIV_DMC1); | |
387 | ||
388 | tmp &= ~(S5P_CLKDIV_DMC1_G2D_ACP_MASK | | |
389 | S5P_CLKDIV_DMC1_C2C_MASK | | |
390 | S5P_CLKDIV_DMC1_C2CACLK_MASK); | |
391 | ||
392 | tmp |= ((exynos4x12_clkdiv_dmc1[index][0] << | |
393 | S5P_CLKDIV_DMC1_G2D_ACP_SHIFT) | | |
394 | (exynos4x12_clkdiv_dmc1[index][1] << | |
395 | S5P_CLKDIV_DMC1_C2C_SHIFT) | | |
396 | (exynos4x12_clkdiv_dmc1[index][2] << | |
397 | S5P_CLKDIV_DMC1_C2CACLK_SHIFT)); | |
398 | ||
399 | __raw_writel(tmp, S5P_CLKDIV_DMC1); | |
400 | ||
401 | do { | |
402 | tmp = __raw_readl(S5P_CLKDIV_STAT_DMC1); | |
403 | } while (tmp & 0x111111); | |
404 | ||
405 | /* Change Divider - TOP */ | |
406 | tmp = __raw_readl(S5P_CLKDIV_TOP); | |
407 | ||
408 | tmp &= ~(S5P_CLKDIV_TOP_ACLK266_GPS_MASK | | |
409 | S5P_CLKDIV_TOP_ACLK100_MASK | | |
410 | S5P_CLKDIV_TOP_ACLK160_MASK | | |
411 | S5P_CLKDIV_TOP_ACLK133_MASK | | |
412 | S5P_CLKDIV_TOP_ONENAND_MASK); | |
413 | ||
414 | tmp |= ((exynos4x12_clkdiv_top[index][0] << | |
415 | S5P_CLKDIV_TOP_ACLK266_GPS_SHIFT) | | |
416 | (exynos4x12_clkdiv_top[index][1] << | |
417 | S5P_CLKDIV_TOP_ACLK100_SHIFT) | | |
418 | (exynos4x12_clkdiv_top[index][2] << | |
419 | S5P_CLKDIV_TOP_ACLK160_SHIFT) | | |
420 | (exynos4x12_clkdiv_top[index][3] << | |
421 | S5P_CLKDIV_TOP_ACLK133_SHIFT) | | |
422 | (exynos4x12_clkdiv_top[index][4] << | |
423 | S5P_CLKDIV_TOP_ONENAND_SHIFT)); | |
424 | ||
425 | __raw_writel(tmp, S5P_CLKDIV_TOP); | |
426 | ||
427 | do { | |
428 | tmp = __raw_readl(S5P_CLKDIV_STAT_TOP); | |
429 | } while (tmp & 0x11111); | |
430 | ||
431 | /* Change Divider - LEFTBUS */ | |
432 | tmp = __raw_readl(S5P_CLKDIV_LEFTBUS); | |
433 | ||
434 | tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK); | |
435 | ||
436 | tmp |= ((exynos4x12_clkdiv_lr_bus[index][0] << | |
437 | S5P_CLKDIV_BUS_GDLR_SHIFT) | | |
438 | (exynos4x12_clkdiv_lr_bus[index][1] << | |
439 | S5P_CLKDIV_BUS_GPLR_SHIFT)); | |
440 | ||
441 | __raw_writel(tmp, S5P_CLKDIV_LEFTBUS); | |
442 | ||
443 | do { | |
444 | tmp = __raw_readl(S5P_CLKDIV_STAT_LEFTBUS); | |
445 | } while (tmp & 0x11); | |
446 | ||
447 | /* Change Divider - RIGHTBUS */ | |
448 | tmp = __raw_readl(S5P_CLKDIV_RIGHTBUS); | |
449 | ||
450 | tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK); | |
451 | ||
452 | tmp |= ((exynos4x12_clkdiv_lr_bus[index][0] << | |
453 | S5P_CLKDIV_BUS_GDLR_SHIFT) | | |
454 | (exynos4x12_clkdiv_lr_bus[index][1] << | |
455 | S5P_CLKDIV_BUS_GPLR_SHIFT)); | |
456 | ||
457 | __raw_writel(tmp, S5P_CLKDIV_RIGHTBUS); | |
458 | ||
459 | do { | |
460 | tmp = __raw_readl(S5P_CLKDIV_STAT_RIGHTBUS); | |
461 | } while (tmp & 0x11); | |
462 | ||
463 | /* Change Divider - MFC */ | |
464 | tmp = __raw_readl(S5P_CLKDIV_MFC); | |
465 | ||
466 | tmp &= ~(S5P_CLKDIV_MFC_MASK); | |
467 | ||
468 | tmp |= ((exynos4x12_clkdiv_sclkip[index][0] << | |
469 | S5P_CLKDIV_MFC_SHIFT)); | |
470 | ||
471 | __raw_writel(tmp, S5P_CLKDIV_MFC); | |
472 | ||
473 | do { | |
474 | tmp = __raw_readl(S5P_CLKDIV_STAT_MFC); | |
475 | } while (tmp & 0x1); | |
476 | ||
477 | /* Change Divider - JPEG */ | |
478 | tmp = __raw_readl(S5P_CLKDIV_CAM1); | |
479 | ||
480 | tmp &= ~(S5P_CLKDIV_CAM1_JPEG_MASK); | |
481 | ||
482 | tmp |= ((exynos4x12_clkdiv_sclkip[index][1] << | |
483 | S5P_CLKDIV_CAM1_JPEG_SHIFT)); | |
484 | ||
485 | __raw_writel(tmp, S5P_CLKDIV_CAM1); | |
486 | ||
487 | do { | |
488 | tmp = __raw_readl(S5P_CLKDIV_STAT_CAM1); | |
489 | } while (tmp & 0x1); | |
490 | ||
491 | /* Change Divider - FIMC0~3 */ | |
492 | tmp = __raw_readl(S5P_CLKDIV_CAM); | |
493 | ||
494 | tmp &= ~(S5P_CLKDIV_CAM_FIMC0_MASK | S5P_CLKDIV_CAM_FIMC1_MASK | | |
495 | S5P_CLKDIV_CAM_FIMC2_MASK | S5P_CLKDIV_CAM_FIMC3_MASK); | |
496 | ||
497 | tmp |= ((exynos4x12_clkdiv_sclkip[index][2] << | |
498 | S5P_CLKDIV_CAM_FIMC0_SHIFT) | | |
499 | (exynos4x12_clkdiv_sclkip[index][2] << | |
500 | S5P_CLKDIV_CAM_FIMC1_SHIFT) | | |
501 | (exynos4x12_clkdiv_sclkip[index][2] << | |
502 | S5P_CLKDIV_CAM_FIMC2_SHIFT) | | |
503 | (exynos4x12_clkdiv_sclkip[index][2] << | |
504 | S5P_CLKDIV_CAM_FIMC3_SHIFT)); | |
505 | ||
506 | __raw_writel(tmp, S5P_CLKDIV_CAM); | |
507 | ||
508 | do { | |
509 | tmp = __raw_readl(S5P_CLKDIV_STAT_CAM1); | |
510 | } while (tmp & 0x1111); | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | ||
516 | static void busfreq_mon_reset(struct busfreq_data *data) | |
517 | { | |
518 | unsigned int i; | |
519 | ||
520 | for (i = 0; i < 2; i++) { | |
521 | void __iomem *ppmu_base = data->dmc[i].hw_base; | |
522 | ||
523 | /* Reset PPMU */ | |
524 | __raw_writel(0x8000000f, ppmu_base + 0xf010); | |
525 | __raw_writel(0x8000000f, ppmu_base + 0xf050); | |
526 | __raw_writel(0x6, ppmu_base + 0xf000); | |
527 | __raw_writel(0x0, ppmu_base + 0xf100); | |
528 | ||
529 | /* Set PPMU Event */ | |
530 | data->dmc[i].event = 0x6; | |
531 | __raw_writel(((data->dmc[i].event << 12) | 0x1), | |
532 | ppmu_base + 0xfc); | |
533 | ||
534 | /* Start PPMU */ | |
535 | __raw_writel(0x1, ppmu_base + 0xf000); | |
536 | } | |
537 | } | |
538 | ||
539 | static void exynos4_read_ppmu(struct busfreq_data *data) | |
540 | { | |
541 | int i, j; | |
542 | ||
543 | for (i = 0; i < 2; i++) { | |
544 | void __iomem *ppmu_base = data->dmc[i].hw_base; | |
545 | u32 overflow; | |
546 | ||
547 | /* Stop PPMU */ | |
548 | __raw_writel(0x0, ppmu_base + 0xf000); | |
549 | ||
550 | /* Update local data from PPMU */ | |
551 | overflow = __raw_readl(ppmu_base + 0xf050); | |
552 | ||
553 | data->dmc[i].ccnt = __raw_readl(ppmu_base + 0xf100); | |
554 | data->dmc[i].ccnt_overflow = overflow & (1 << 31); | |
555 | ||
556 | for (j = 0; j < PPMU_PMNCNT_MAX; j++) { | |
557 | data->dmc[i].count[j] = __raw_readl( | |
558 | ppmu_base + (0xf110 + (0x10 * j))); | |
559 | data->dmc[i].count_overflow[j] = overflow & (1 << j); | |
560 | } | |
561 | } | |
562 | ||
563 | busfreq_mon_reset(data); | |
564 | } | |
565 | ||
566 | static int exynos4x12_get_intspec(unsigned long mifclk) | |
567 | { | |
568 | int i = 0; | |
569 | ||
570 | while (exynos4x12_intclk_table[i].clk) { | |
571 | if (exynos4x12_intclk_table[i].clk <= mifclk) | |
572 | return i; | |
573 | i++; | |
574 | } | |
575 | ||
576 | return -EINVAL; | |
577 | } | |
578 | ||
579 | static int exynos4_bus_setvolt(struct busfreq_data *data, struct opp *opp, | |
580 | struct opp *oldopp) | |
581 | { | |
582 | int err = 0, tmp; | |
583 | unsigned long volt = opp_get_voltage(opp); | |
584 | ||
585 | switch (data->type) { | |
586 | case TYPE_BUSF_EXYNOS4210: | |
587 | /* OPP represents DMC clock + INT voltage */ | |
588 | err = regulator_set_voltage(data->vdd_int, volt, | |
589 | MAX_SAFEVOLT); | |
590 | break; | |
591 | case TYPE_BUSF_EXYNOS4x12: | |
592 | /* OPP represents MIF clock + MIF voltage */ | |
593 | err = regulator_set_voltage(data->vdd_mif, volt, | |
594 | MAX_SAFEVOLT); | |
595 | if (err) | |
596 | break; | |
597 | ||
598 | tmp = exynos4x12_get_intspec(opp_get_freq(opp)); | |
599 | if (tmp < 0) { | |
600 | err = tmp; | |
601 | regulator_set_voltage(data->vdd_mif, | |
602 | opp_get_voltage(oldopp), | |
603 | MAX_SAFEVOLT); | |
604 | break; | |
605 | } | |
606 | err = regulator_set_voltage(data->vdd_int, | |
607 | exynos4x12_intclk_table[tmp].volt, | |
608 | MAX_SAFEVOLT); | |
609 | /* Try to recover */ | |
610 | if (err) | |
611 | regulator_set_voltage(data->vdd_mif, | |
612 | opp_get_voltage(oldopp), | |
613 | MAX_SAFEVOLT); | |
614 | break; | |
615 | default: | |
616 | err = -EINVAL; | |
617 | } | |
618 | ||
619 | return err; | |
620 | } | |
621 | ||
622 | static int exynos4_bus_target(struct device *dev, unsigned long *_freq) | |
623 | { | |
624 | int err = 0; | |
625 | struct platform_device *pdev = container_of(dev, struct platform_device, | |
626 | dev); | |
627 | struct busfreq_data *data = platform_get_drvdata(pdev); | |
628 | struct opp *opp = devfreq_recommended_opp(dev, _freq); | |
629 | unsigned long old_freq = opp_get_freq(data->curr_opp); | |
630 | unsigned long freq = opp_get_freq(opp); | |
631 | ||
632 | if (old_freq == freq) | |
633 | return 0; | |
634 | ||
635 | dev_dbg(dev, "targetting %lukHz %luuV\n", freq, opp_get_voltage(opp)); | |
636 | ||
637 | mutex_lock(&data->lock); | |
638 | ||
639 | if (data->disabled) | |
640 | goto out; | |
641 | ||
642 | if (old_freq < freq) | |
643 | err = exynos4_bus_setvolt(data, opp, data->curr_opp); | |
644 | if (err) | |
645 | goto out; | |
646 | ||
647 | if (old_freq != freq) { | |
648 | switch (data->type) { | |
649 | case TYPE_BUSF_EXYNOS4210: | |
650 | err = exynos4210_set_busclk(data, opp); | |
651 | break; | |
652 | case TYPE_BUSF_EXYNOS4x12: | |
653 | err = exynos4x12_set_busclk(data, opp); | |
654 | break; | |
655 | default: | |
656 | err = -EINVAL; | |
657 | } | |
658 | } | |
659 | if (err) | |
660 | goto out; | |
661 | ||
662 | if (old_freq > freq) | |
663 | err = exynos4_bus_setvolt(data, opp, data->curr_opp); | |
664 | if (err) | |
665 | goto out; | |
666 | ||
667 | data->curr_opp = opp; | |
668 | out: | |
669 | mutex_unlock(&data->lock); | |
670 | return err; | |
671 | } | |
672 | ||
673 | static int exynos4_get_busier_dmc(struct busfreq_data *data) | |
674 | { | |
675 | u64 p0 = data->dmc[0].count[0]; | |
676 | u64 p1 = data->dmc[1].count[0]; | |
677 | ||
678 | p0 *= data->dmc[1].ccnt; | |
679 | p1 *= data->dmc[0].ccnt; | |
680 | ||
681 | if (data->dmc[1].ccnt == 0) | |
682 | return 0; | |
683 | ||
684 | if (p0 > p1) | |
685 | return 0; | |
686 | return 1; | |
687 | } | |
688 | ||
689 | static int exynos4_bus_get_dev_status(struct device *dev, | |
690 | struct devfreq_dev_status *stat) | |
691 | { | |
692 | struct platform_device *pdev = container_of(dev, struct platform_device, | |
693 | dev); | |
694 | struct busfreq_data *data = platform_get_drvdata(pdev); | |
695 | int busier_dmc; | |
696 | int cycles_x2 = 2; /* 2 x cycles */ | |
697 | void __iomem *addr; | |
698 | u32 timing; | |
699 | u32 memctrl; | |
700 | ||
701 | exynos4_read_ppmu(data); | |
702 | busier_dmc = exynos4_get_busier_dmc(data); | |
703 | stat->current_frequency = opp_get_freq(data->curr_opp); | |
704 | ||
705 | if (busier_dmc) | |
706 | addr = S5P_VA_DMC1; | |
707 | else | |
708 | addr = S5P_VA_DMC0; | |
709 | ||
710 | memctrl = __raw_readl(addr + 0x04); /* one of DDR2/3/LPDDR2 */ | |
711 | timing = __raw_readl(addr + 0x38); /* CL or WL/RL values */ | |
712 | ||
713 | switch ((memctrl >> 8) & 0xf) { | |
714 | case 0x4: /* DDR2 */ | |
715 | cycles_x2 = ((timing >> 16) & 0xf) * 2; | |
716 | break; | |
717 | case 0x5: /* LPDDR2 */ | |
718 | case 0x6: /* DDR3 */ | |
719 | cycles_x2 = ((timing >> 8) & 0xf) + ((timing >> 0) & 0xf); | |
720 | break; | |
721 | default: | |
722 | pr_err("%s: Unknown Memory Type(%d).\n", __func__, | |
723 | (memctrl >> 8) & 0xf); | |
724 | return -EINVAL; | |
725 | } | |
726 | ||
727 | /* Number of cycles spent on memory access */ | |
728 | stat->busy_time = data->dmc[busier_dmc].count[0] / 2 * (cycles_x2 + 2); | |
729 | stat->busy_time *= 100 / BUS_SATURATION_RATIO; | |
730 | stat->total_time = data->dmc[busier_dmc].ccnt; | |
731 | ||
732 | /* If the counters have overflown, retry */ | |
733 | if (data->dmc[busier_dmc].ccnt_overflow || | |
734 | data->dmc[busier_dmc].count_overflow[0]) | |
735 | return -EAGAIN; | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
740 | static void exynos4_bus_exit(struct device *dev) | |
741 | { | |
742 | struct platform_device *pdev = container_of(dev, struct platform_device, | |
743 | dev); | |
744 | struct busfreq_data *data = platform_get_drvdata(pdev); | |
745 | ||
746 | devfreq_unregister_opp_notifier(dev, data->devfreq); | |
747 | } | |
748 | ||
749 | static struct devfreq_dev_profile exynos4_devfreq_profile = { | |
750 | .initial_freq = 400000, | |
751 | .polling_ms = 50, | |
752 | .target = exynos4_bus_target, | |
753 | .get_dev_status = exynos4_bus_get_dev_status, | |
754 | .exit = exynos4_bus_exit, | |
755 | }; | |
756 | ||
757 | static int exynos4210_init_tables(struct busfreq_data *data) | |
758 | { | |
759 | u32 tmp; | |
760 | int mgrp; | |
761 | int i, err = 0; | |
762 | ||
763 | tmp = __raw_readl(S5P_CLKDIV_DMC0); | |
764 | for (i = LV_0; i < EX4210_LV_NUM; i++) { | |
765 | tmp &= ~(S5P_CLKDIV_DMC0_ACP_MASK | | |
766 | S5P_CLKDIV_DMC0_ACPPCLK_MASK | | |
767 | S5P_CLKDIV_DMC0_DPHY_MASK | | |
768 | S5P_CLKDIV_DMC0_DMC_MASK | | |
769 | S5P_CLKDIV_DMC0_DMCD_MASK | | |
770 | S5P_CLKDIV_DMC0_DMCP_MASK | | |
771 | S5P_CLKDIV_DMC0_COPY2_MASK | | |
772 | S5P_CLKDIV_DMC0_CORETI_MASK); | |
773 | ||
774 | tmp |= ((exynos4210_clkdiv_dmc0[i][0] << | |
775 | S5P_CLKDIV_DMC0_ACP_SHIFT) | | |
776 | (exynos4210_clkdiv_dmc0[i][1] << | |
777 | S5P_CLKDIV_DMC0_ACPPCLK_SHIFT) | | |
778 | (exynos4210_clkdiv_dmc0[i][2] << | |
779 | S5P_CLKDIV_DMC0_DPHY_SHIFT) | | |
780 | (exynos4210_clkdiv_dmc0[i][3] << | |
781 | S5P_CLKDIV_DMC0_DMC_SHIFT) | | |
782 | (exynos4210_clkdiv_dmc0[i][4] << | |
783 | S5P_CLKDIV_DMC0_DMCD_SHIFT) | | |
784 | (exynos4210_clkdiv_dmc0[i][5] << | |
785 | S5P_CLKDIV_DMC0_DMCP_SHIFT) | | |
786 | (exynos4210_clkdiv_dmc0[i][6] << | |
787 | S5P_CLKDIV_DMC0_COPY2_SHIFT) | | |
788 | (exynos4210_clkdiv_dmc0[i][7] << | |
789 | S5P_CLKDIV_DMC0_CORETI_SHIFT)); | |
790 | ||
791 | data->dmc_divtable[i] = tmp; | |
792 | } | |
793 | ||
794 | tmp = __raw_readl(S5P_CLKDIV_TOP); | |
795 | for (i = LV_0; i < EX4210_LV_NUM; i++) { | |
796 | tmp &= ~(S5P_CLKDIV_TOP_ACLK200_MASK | | |
797 | S5P_CLKDIV_TOP_ACLK100_MASK | | |
798 | S5P_CLKDIV_TOP_ACLK160_MASK | | |
799 | S5P_CLKDIV_TOP_ACLK133_MASK | | |
800 | S5P_CLKDIV_TOP_ONENAND_MASK); | |
801 | ||
802 | tmp |= ((exynos4210_clkdiv_top[i][0] << | |
803 | S5P_CLKDIV_TOP_ACLK200_SHIFT) | | |
804 | (exynos4210_clkdiv_top[i][1] << | |
805 | S5P_CLKDIV_TOP_ACLK100_SHIFT) | | |
806 | (exynos4210_clkdiv_top[i][2] << | |
807 | S5P_CLKDIV_TOP_ACLK160_SHIFT) | | |
808 | (exynos4210_clkdiv_top[i][3] << | |
809 | S5P_CLKDIV_TOP_ACLK133_SHIFT) | | |
810 | (exynos4210_clkdiv_top[i][4] << | |
811 | S5P_CLKDIV_TOP_ONENAND_SHIFT)); | |
812 | ||
813 | data->top_divtable[i] = tmp; | |
814 | } | |
815 | ||
816 | #ifdef CONFIG_EXYNOS_ASV | |
817 | tmp = exynos4_result_of_asv; | |
818 | #else | |
819 | tmp = 0; /* Max voltages for the reliability of the unknown */ | |
820 | #endif | |
821 | ||
822 | pr_debug("ASV Group of Exynos4 is %d\n", tmp); | |
823 | /* Use merged grouping for voltage */ | |
824 | switch (tmp) { | |
825 | case 0: | |
826 | mgrp = 0; | |
827 | break; | |
828 | case 1: | |
829 | case 2: | |
830 | mgrp = 1; | |
831 | break; | |
832 | case 3: | |
833 | case 4: | |
834 | mgrp = 2; | |
835 | break; | |
836 | case 5: | |
837 | case 6: | |
838 | mgrp = 3; | |
839 | break; | |
840 | case 7: | |
841 | mgrp = 4; | |
842 | break; | |
843 | default: | |
844 | pr_warn("Unknown ASV Group. Use max voltage.\n"); | |
845 | mgrp = 0; | |
846 | } | |
847 | ||
848 | for (i = LV_0; i < EX4210_LV_NUM; i++) | |
849 | exynos4210_busclk_table[i].volt = exynos4210_asv_volt[mgrp][i]; | |
850 | ||
851 | for (i = LV_0; i < EX4210_LV_NUM; i++) { | |
852 | err = opp_add(data->dev, exynos4210_busclk_table[i].clk, | |
853 | exynos4210_busclk_table[i].volt); | |
854 | if (err) { | |
855 | dev_err(data->dev, "Cannot add opp entries.\n"); | |
856 | return err; | |
857 | } | |
858 | } | |
859 | ||
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
864 | static int exynos4x12_init_tables(struct busfreq_data *data) | |
865 | { | |
866 | unsigned int i; | |
867 | unsigned int tmp; | |
868 | int ret; | |
869 | ||
870 | /* Enable pause function for DREX2 DVFS */ | |
871 | tmp = __raw_readl(S5P_DMC_PAUSE_CTRL); | |
872 | tmp |= DMC_PAUSE_ENABLE; | |
873 | __raw_writel(tmp, S5P_DMC_PAUSE_CTRL); | |
874 | ||
875 | tmp = __raw_readl(S5P_CLKDIV_DMC0); | |
876 | ||
877 | for (i = 0; i < EX4x12_LV_NUM; i++) { | |
878 | tmp &= ~(S5P_CLKDIV_DMC0_ACP_MASK | | |
879 | S5P_CLKDIV_DMC0_ACPPCLK_MASK | | |
880 | S5P_CLKDIV_DMC0_DPHY_MASK | | |
881 | S5P_CLKDIV_DMC0_DMC_MASK | | |
882 | S5P_CLKDIV_DMC0_DMCD_MASK | | |
883 | S5P_CLKDIV_DMC0_DMCP_MASK); | |
884 | ||
885 | tmp |= ((exynos4x12_clkdiv_dmc0[i][0] << | |
886 | S5P_CLKDIV_DMC0_ACP_SHIFT) | | |
887 | (exynos4x12_clkdiv_dmc0[i][1] << | |
888 | S5P_CLKDIV_DMC0_ACPPCLK_SHIFT) | | |
889 | (exynos4x12_clkdiv_dmc0[i][2] << | |
890 | S5P_CLKDIV_DMC0_DPHY_SHIFT) | | |
891 | (exynos4x12_clkdiv_dmc0[i][3] << | |
892 | S5P_CLKDIV_DMC0_DMC_SHIFT) | | |
893 | (exynos4x12_clkdiv_dmc0[i][4] << | |
894 | S5P_CLKDIV_DMC0_DMCD_SHIFT) | | |
895 | (exynos4x12_clkdiv_dmc0[i][5] << | |
896 | S5P_CLKDIV_DMC0_DMCP_SHIFT)); | |
897 | ||
898 | data->dmc_divtable[i] = tmp; | |
899 | } | |
900 | ||
901 | #ifdef CONFIG_EXYNOS_ASV | |
902 | tmp = exynos4_result_of_asv; | |
903 | #else | |
904 | tmp = 0; /* Max voltages for the reliability of the unknown */ | |
905 | #endif | |
906 | ||
907 | if (tmp > 8) | |
908 | tmp = 0; | |
909 | pr_debug("ASV Group of Exynos4x12 is %d\n", tmp); | |
910 | ||
911 | for (i = 0; i < EX4x12_LV_NUM; i++) { | |
912 | exynos4x12_mifclk_table[i].volt = | |
913 | exynos4x12_mif_step_50[tmp][i]; | |
914 | exynos4x12_intclk_table[i].volt = | |
915 | exynos4x12_int_volt[tmp][i]; | |
916 | } | |
917 | ||
918 | for (i = 0; i < EX4x12_LV_NUM; i++) { | |
919 | ret = opp_add(data->dev, exynos4x12_mifclk_table[i].clk, | |
920 | exynos4x12_mifclk_table[i].volt); | |
921 | if (ret) { | |
922 | dev_err(data->dev, "Fail to add opp entries.\n"); | |
923 | return ret; | |
924 | } | |
925 | } | |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
930 | static int exynos4_busfreq_pm_notifier_event(struct notifier_block *this, | |
931 | unsigned long event, void *ptr) | |
932 | { | |
933 | struct busfreq_data *data = container_of(this, struct busfreq_data, | |
934 | pm_notifier); | |
935 | struct opp *opp; | |
936 | unsigned long maxfreq = ULONG_MAX; | |
937 | int err = 0; | |
938 | ||
939 | switch (event) { | |
940 | case PM_SUSPEND_PREPARE: | |
941 | /* Set Fastest and Deactivate DVFS */ | |
942 | mutex_lock(&data->lock); | |
943 | ||
944 | data->disabled = true; | |
945 | ||
946 | opp = opp_find_freq_floor(data->dev, &maxfreq); | |
947 | ||
948 | err = exynos4_bus_setvolt(data, opp, data->curr_opp); | |
949 | if (err) | |
950 | goto unlock; | |
951 | ||
952 | switch (data->type) { | |
953 | case TYPE_BUSF_EXYNOS4210: | |
954 | err = exynos4210_set_busclk(data, opp); | |
955 | break; | |
956 | case TYPE_BUSF_EXYNOS4x12: | |
957 | err = exynos4x12_set_busclk(data, opp); | |
958 | break; | |
959 | default: | |
960 | err = -EINVAL; | |
961 | } | |
962 | if (err) | |
963 | goto unlock; | |
964 | ||
965 | data->curr_opp = opp; | |
966 | unlock: | |
967 | mutex_unlock(&data->lock); | |
968 | if (err) | |
969 | return err; | |
970 | return NOTIFY_OK; | |
971 | case PM_POST_RESTORE: | |
972 | case PM_POST_SUSPEND: | |
973 | /* Reactivate */ | |
974 | mutex_lock(&data->lock); | |
975 | data->disabled = false; | |
976 | mutex_unlock(&data->lock); | |
977 | return NOTIFY_OK; | |
978 | } | |
979 | ||
980 | return NOTIFY_DONE; | |
981 | } | |
982 | ||
983 | static __devinit int exynos4_busfreq_probe(struct platform_device *pdev) | |
984 | { | |
985 | struct busfreq_data *data; | |
986 | struct opp *opp; | |
987 | struct device *dev = &pdev->dev; | |
988 | int err = 0; | |
989 | ||
990 | data = kzalloc(sizeof(struct busfreq_data), GFP_KERNEL); | |
991 | if (data == NULL) { | |
992 | dev_err(dev, "Cannot allocate memory.\n"); | |
993 | return -ENOMEM; | |
994 | } | |
995 | ||
996 | data->type = pdev->id_entry->driver_data; | |
997 | data->dmc[0].hw_base = S5P_VA_DMC0; | |
998 | data->dmc[1].hw_base = S5P_VA_DMC1; | |
999 | data->pm_notifier.notifier_call = exynos4_busfreq_pm_notifier_event; | |
1000 | data->dev = dev; | |
1001 | mutex_init(&data->lock); | |
1002 | ||
1003 | switch (data->type) { | |
1004 | case TYPE_BUSF_EXYNOS4210: | |
1005 | err = exynos4210_init_tables(data); | |
1006 | break; | |
1007 | case TYPE_BUSF_EXYNOS4x12: | |
1008 | err = exynos4x12_init_tables(data); | |
1009 | break; | |
1010 | default: | |
1011 | dev_err(dev, "Cannot determine the device id %d\n", data->type); | |
1012 | err = -EINVAL; | |
1013 | } | |
1014 | if (err) | |
1015 | goto err_regulator; | |
1016 | ||
1017 | data->vdd_int = regulator_get(dev, "vdd_int"); | |
1018 | if (IS_ERR(data->vdd_int)) { | |
1019 | dev_err(dev, "Cannot get the regulator \"vdd_int\"\n"); | |
1020 | err = PTR_ERR(data->vdd_int); | |
1021 | goto err_regulator; | |
1022 | } | |
1023 | if (data->type == TYPE_BUSF_EXYNOS4x12) { | |
1024 | data->vdd_mif = regulator_get(dev, "vdd_mif"); | |
1025 | if (IS_ERR(data->vdd_mif)) { | |
1026 | dev_err(dev, "Cannot get the regulator \"vdd_mif\"\n"); | |
1027 | err = PTR_ERR(data->vdd_mif); | |
1028 | regulator_put(data->vdd_int); | |
1029 | goto err_regulator; | |
1030 | ||
1031 | } | |
1032 | } | |
1033 | ||
1034 | opp = opp_find_freq_floor(dev, &exynos4_devfreq_profile.initial_freq); | |
1035 | if (IS_ERR(opp)) { | |
1036 | dev_err(dev, "Invalid initial frequency %lu kHz.\n", | |
1037 | exynos4_devfreq_profile.initial_freq); | |
1038 | err = PTR_ERR(opp); | |
1039 | goto err_opp_add; | |
1040 | } | |
1041 | data->curr_opp = opp; | |
1042 | ||
1043 | platform_set_drvdata(pdev, data); | |
1044 | ||
1045 | busfreq_mon_reset(data); | |
1046 | ||
1047 | data->devfreq = devfreq_add_device(dev, &exynos4_devfreq_profile, | |
1048 | &devfreq_simple_ondemand, NULL); | |
1049 | if (IS_ERR(data->devfreq)) { | |
1050 | err = PTR_ERR(data->devfreq); | |
1051 | goto err_opp_add; | |
1052 | } | |
1053 | ||
1054 | devfreq_register_opp_notifier(dev, data->devfreq); | |
1055 | ||
1056 | err = register_pm_notifier(&data->pm_notifier); | |
1057 | if (err) { | |
1058 | dev_err(dev, "Failed to setup pm notifier\n"); | |
1059 | goto err_devfreq_add; | |
1060 | } | |
1061 | ||
1062 | return 0; | |
1063 | err_devfreq_add: | |
1064 | devfreq_remove_device(data->devfreq); | |
1065 | err_opp_add: | |
1066 | if (data->vdd_mif) | |
1067 | regulator_put(data->vdd_mif); | |
1068 | regulator_put(data->vdd_int); | |
1069 | err_regulator: | |
1070 | kfree(data); | |
1071 | return err; | |
1072 | } | |
1073 | ||
1074 | static __devexit int exynos4_busfreq_remove(struct platform_device *pdev) | |
1075 | { | |
1076 | struct busfreq_data *data = platform_get_drvdata(pdev); | |
1077 | ||
1078 | unregister_pm_notifier(&data->pm_notifier); | |
1079 | devfreq_remove_device(data->devfreq); | |
1080 | regulator_put(data->vdd_int); | |
1081 | if (data->vdd_mif) | |
1082 | regulator_put(data->vdd_mif); | |
1083 | kfree(data); | |
1084 | ||
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | static int exynos4_busfreq_resume(struct device *dev) | |
1089 | { | |
1090 | struct platform_device *pdev = container_of(dev, struct platform_device, | |
1091 | dev); | |
1092 | struct busfreq_data *data = platform_get_drvdata(pdev); | |
1093 | ||
1094 | busfreq_mon_reset(data); | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static const struct dev_pm_ops exynos4_busfreq_pm = { | |
1099 | .resume = exynos4_busfreq_resume, | |
1100 | }; | |
1101 | ||
1102 | static const struct platform_device_id exynos4_busfreq_id[] = { | |
1103 | { "exynos4210-busfreq", TYPE_BUSF_EXYNOS4210 }, | |
1104 | { "exynos4412-busfreq", TYPE_BUSF_EXYNOS4x12 }, | |
1105 | { "exynos4212-busfreq", TYPE_BUSF_EXYNOS4x12 }, | |
1106 | { }, | |
1107 | }; | |
1108 | ||
1109 | static struct platform_driver exynos4_busfreq_driver = { | |
1110 | .probe = exynos4_busfreq_probe, | |
1111 | .remove = __devexit_p(exynos4_busfreq_remove), | |
1112 | .id_table = exynos4_busfreq_id, | |
1113 | .driver = { | |
1114 | .name = "exynos4-busfreq", | |
1115 | .owner = THIS_MODULE, | |
1116 | .pm = &exynos4_busfreq_pm, | |
1117 | }, | |
1118 | }; | |
1119 | ||
1120 | static int __init exynos4_busfreq_init(void) | |
1121 | { | |
1122 | return platform_driver_register(&exynos4_busfreq_driver); | |
1123 | } | |
1124 | late_initcall(exynos4_busfreq_init); | |
1125 | ||
1126 | static void __exit exynos4_busfreq_exit(void) | |
1127 | { | |
1128 | platform_driver_unregister(&exynos4_busfreq_driver); | |
1129 | } | |
1130 | module_exit(exynos4_busfreq_exit); | |
1131 | ||
1132 | MODULE_LICENSE("GPL"); | |
1133 | MODULE_DESCRIPTION("EXYNOS4 busfreq driver with devfreq framework"); | |
1134 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1135 | MODULE_ALIAS("exynos4-busfreq"); |